Hayward D.E.CX1037 Flex Tube Nest Replacement for Hayward Perflex Extended Cycle D.E. Filter Flex tube nest replacement Fits hayward perflex extended-cycle d.e. filter models ec50ac, i_pfppts, ec50c80x5s Kit includes 1 bump shafts, 2 tube sheets, 1 diaphragm gaskets, 1 bump shaft kit and 1 tube sheet hex screw set Weight 15.1-pound